13893949 has 2 divisors, whose sum is σ = 13893950. Its totient is φ = 13893948.

The previous prime is 13893941. The next prime is 13893953. The reversal of 13893949 is 94939831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13741849 + 152100 = 3707^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 13893949 - 2³ = 13893941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13893899 and 13893908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13893941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6946974 + 6946975.

It is an arithmetic number, because the mean of its divisors is an integer number (6946975).

Almost surely, 2^13893949 is an apocalyptic number.

It is an amenable number.

13893949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13893949 is an equidigital number, since it uses as much as digits as its factorization.

13893949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 13893949 is about 3727.4587858218. The cubic root of 13893949 is about 240.4041166125.

The spelling of 13893949 in words is "thirteen million, eight hundred ninety-three thousand, nine hundred forty-nine".